Sock



FIG. 1 is a front perspective view of a sock showing my new design, thebroken lines illustrating a leg in this and other figures being forpurposes of illustration only and forming no part of my claimed design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for a sock, as shown and described. 